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Subject: Re: [DCHAS-L] autoignition temperatures vs H codes
Date: Tuesday, September 11, 2018 at 9:15:19 AM
Author: Erik H Tyge (ehtyge) <ehtyge**At_Symbol_Here**MEMPHIS.EDU> 		Next by Date:
Subject: Re: [DCHAS-L] Auto-ignition temperatures
Date: Tue, 11 Sep 2018 10:41:48 -0400
Author: Jeffrey Lewin

From: Monona Rossol <0000030664c37427-dmarc-request**At_Symbol_Here**LISTS.PRINCETON.EDU>
Subject: Re: [DCHAS-L] Auto-ignition temperatures
Date: Tue, 11 Sep 2018 09:29:54 -0400
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: 165c8d2f9ee-1ebf-49d9**At_Symbol_Here**webjas-vae058.srv.aolmail.net
In-Reply-To


As I understand it, aluminum dust is not a pyrophoric.  You need an initiator to trigger the rapid burn of aluminum and other metal powders.  That's what the e-matches and detonating cords are for.

Monona Rossol, M.S., M.F.A., Industrial Hygienist
President:  Arts, Crafts & Theater Safety, Inc.
Safety Officer: Local USA829, IATSE
Safety Consultant:  SAG-AFTRA
181 Thompson St., #23
New York, NY 10012     212-777-0062
actsnyc**At_Symbol_Here**cs.com   www.artscraftstheatersafety.org

 


-----Original Message-----
From: Debbie M. Decker <dmdecker**At_Symbol_Here**UCDAVIS.EDU>
To: DCHAS-L <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Sent: Tue, Sep 11, 2018 5:34 am
Subject: [DCHAS-L] Auto-ignition temperatures

Hi All:
 
We're working through a list of materials classified as H250 (pyrophoric) but are having a terrible time finding auto-ignition data to back up that classification.  It appears to have evaporated off Sigma SDS' and other sources (CRC, PubChem, ChemSpider, CAMEO) don't seem to have it either.  Most irritating, to me, is the classification of powdered aluminum as pyrophoric with no auto-ignition data to back it up - just a note "ignites on contact with air."  If that were the case, the entire pyrotechnic and propellant industries would have folded up by now.
 
Does anyone out there have auto-ignition data in a format they're able/willing to share? Or have any insight into where the data has gone off to?
 
Thanks mucho,
Debbie
 
Debbie M. Decker, CCHO, ACS Fellow
Past Chair, Division of Chemical Health and Safety
Councilor and Programming Co-Chair
University of California, Davis
(530)754-7964
(530)304-6728
dmdecker**At_Symbol_Here**ucdavis.edu
 
Birkett's hypothesis: "Any chemical reaction
that proceeds smoothly under normal conditions,
can proceed violently in the presence of an idiot."
 
 
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